聚丙烯纤维对固化工程废浆压缩性能和渗透性能的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (9): 3039-3045.

聚丙烯纤维对固化工程废浆压缩性能和渗透性能的影响

白传贞¹, 吉锋¹, 徐桂中², 宋苗苗², 朱鹏³, 吴振威²

1.南水北调东线江苏水源有限责任公司,南京 210029;
2.盐城工学院土木工程学院,盐城 224051;
3.安徽理工大学土木建筑学院,淮南 232001

收稿日期:2021-03-12 修回日期:2021-06-16 出版日期:2021-09-15 发布日期:2021-10-08
通讯作者: 宋苗苗,博士,讲师。E-mail:songmiaomiao12@126.com
作者简介:白传贞(1972—),男,高工。主要从事水利水电工程设计、施工与管理方面的研究。E-mail:404171025@qq.com
基金资助:
国家自然科学基金(51978597);江苏省高等学校自然科学研究面上项目(20KJB560030);江苏省水利科技项目(2020018)

Effect of Polypropylene Fiber on Compression Behavior and Permeability of Cemented Construction Waste Slurry

BAI Chuanzhen¹, JI Feng¹, XU Guizhong², SONG Miaomiao², ZHU Peng³, WU Zhenwei²

1. The Eastern Route of South-to-North Water Diversion Project Jiangsu Water Source Co., Ltd., Nanjing 210029, China;
2. School of Civil Engineering, Yancheng Institute of Technology, Yancheng 224051, China;
3. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China

Received:2021-03-12 Revised:2021-06-16 Online:2021-09-15 Published:2021-10-08

摘要/Abstract

摘要： 通过对聚丙烯纤维加固的固化工程废浆开展室内一维压缩试验和柔性壁渗透试验,研究固化高含水率工程废浆压缩性能和渗透性能随纤维掺量(0%~1.2%,质量分数,下同)和纤维长度(3~18 mm)的变化规律,探讨纤维添加引起固化工程废浆力学性能变化的原因。结果表明,当纤维掺量为0.5%时,纤维添加会引起固化工程废浆体应变和渗透系数减小。此时,对于初始含水率为145%的固化工程废浆,纤维添加引起其体应变的降低幅度随纤维长度的增加而减小。当初始含水率增加至174%时,纤维添加引起固化泥浆体应变的降低幅度则基本不受纤维长度增加的影响;当纤维掺量较高(1.2%)时,和短纤维(<12 mm)相比,相同外加荷载下含长纤维固化工程废浆的体应变和渗透系数增大。对于研究所用工程废浆,聚丙烯纤维的长度和掺量分别以不超过12 mm和1.2%为宜。

关键词: 固化工程废浆, 高含水率, 聚丙烯纤维, 压缩性能, 渗透系数

Abstract: One-dimensional compression tests and permeability tests were conducted to investigate the effects of fibercontent (0% to 1.2%, mass fraction, the same below) and length (3 mm to 18 mm) on compression behavior and permeability of cemented construction waste slurry with high water content. The related mechanisms responsible for changes caused by addition of polypropylene fiber were discussed. The test results indicate that the addition of fiber induces a decrease in the volumetric strain and permeability coefficient of cemented construction waste slurry with 0.5% fiber. Meanwhile, the reduction in the volumetric strain decreases with the increase of the fiber length when the initial water content of tested specimen is 145%, and there is no significant influence of the fiber length on the volumetric strain of specimens with initial water content of 174%. On the other hand, an increase in the volumetric strain and permeability coefficient is observed for specimens with longer fiberthan short fiber (＜12 mm) under the same external pressure as the fiber content increases to 1.2%. In this research, the appropriate fiber length and content is not more than 12 mm and 1.2%, respectively.

Key words: cemented construction waste slurry, high water content, polypropylene fiber, compression behavior, permeability coefficient

中图分类号:

TU44

白传贞, 吉锋, 徐桂中, 宋苗苗, 朱鹏, 吴振威. 聚丙烯纤维对固化工程废浆压缩性能和渗透性能的影响[J]. 硅酸盐通报, 2021, 40(9): 3039-3045.

BAI Chuanzhen, JI Feng, XU Guizhong, SONG Miaomiao, ZHU Peng, WU Zhenwei. Effect of Polypropylene Fiber on Compression Behavior and Permeability of Cemented Construction Waste Slurry[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(9): 3039-3045.

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